I was wondering this. I know that in my area I've only come across about 3 deaf gay people. I've met them through Scruff, Grindr, and I have 2 deaf guys who dated friends of mine. (If you ever want, I can tell you the horrible story of what a hearing friend of mine did to his b/f who was deaf. It'll definitely piss you off.) But there have to be more than just those 3-4 in my area. I live in a small city. There are no Meetups for deaf people. It took me years to even find an ASL class in my area.
So how do you meet other Deaf gay people? At this point, in my limited experience, it seems impossible. I just don't know how y'all do it.